WO2000008498B1

WO2000008498B1 - Device for branching multi-fiber optical cable and method for branching cable using the device

Info

Publication number: WO2000008498B1
Application number: PCT/KR1999/000427
Authority: WO
Inventors: Oh Joon Kwon; Ki Won Seo
Original assignee: Daewoo Telecom Ltd; Oh Joon Kwon; Ki Won Seo
Priority date: 1998-08-03
Filing date: 1999-08-03
Publication date: 2000-04-13
Also published as: WO2000008498A1

Abstract

The branching work is simple, and shrinkage of the cover of an optical cable in its axial direction due to temperature change is prevented. A device (40) for branching multi-fiber optical cable comprises a main branching section and a sub-branching section. An optical cable (50) is branched into optical fiber bundles at the main branching section, and each fiber bundle is branched into single-core optical fibers at the sub-branching section. Each single-core optical fiber is covered with a protective tube (72') and led out. The cover (56) of the optical cable (50) is secured by a cover securing member (80) and a pressing member (90). The length of the protective tube (72') is short, and consequently the work of inserting each single-core optical fiber is easy. Even if a single-core optical fiber is found defective later, the branching work is only for the sub-branching section.

Claims

Claims of the letter of amendment [February 10, 2000 (10.0.200) Accepted by the International Bureau: Claims 1 and 2 originally filed have been withdrawn; Claims 13 and 14 have been amended; other claims remain unchanged. (Page 5)]

1. It is a cylindrical shape having a predetermined inner diameter and length, and on the inner peripheral surface at a certain distance from the inlet 60a and the outlet 6Ob on the basis of the drawing direction of the optical cable 50, each has a certain section. A main housing 60 having a first screwing portion 62 and a second screwing portion 64 formed thereon; and a second screwing portion 64 connected from the outlet side of the main housing 60 in the horizontal direction. A boss 74 having a central tension line fixing hole 74a is formed on the center line, and the branch holes 76 penetrate in a direction parallel to the central tension line fixing hole 74a on the surface. The worn main branch member 70,

The tip of the optical cable inside the main housing 60 is fitted into the branch hole 76 on the main branch member 70 so as to protrude outside the outlet 60 b of the main housing 60. A plurality of flexible tubes 72, into which a number of optical fibers 52 branching from are inserted and guided.

At one end, an inlet 6 Oa ′ into which the flexible tube 72 is fitted is provided, and at the other end, an outlet 6 O from which the single-core optical fiber 52 branched from the retracted flexible tube 72 is discharged. b ′ is formed, and a sub-housing 60 0 ′ in which a third screw portion 6 2 ′ and a fourth screw portion 6 4 ′ are formed at predetermined positions on the inner peripheral surfaces on the inlet and outlet sides respectively over a certain section. When,

A sub-branching member 7 0 ′ spirally coupled to the fourth screw portion 6 4 ′ of the sub-housing 60 ′, and having a plurality of branch holes 7 6 ′ formed on the surface;

The single-core light that is fitted into the branch hole 76 ′ on the sub-branching member 70 ′ so as to protrude by a certain length outside the outlet 6Ob ′ of the sub-housing 60 ′, and is emitted. Numerous protective tubes 7 2 ′ to guide the fibers 52 ′,

An optical cable 50 or a flexible cable which is connected to the inside of the first threaded portion 62 of the main housing 60 and the third threaded portion 62 'of the sub-housing 60' and is drawn through the inlet 86 on the center line. An outer skin fixing member 80 closely adhered to the outer skin of the tube 72;

First threaded portion 62 of main housing 60 and third threaded portion of sub-housing 60 'Corrected paper (Article 19 of the Convention) - twenty two -

A multi-core optical cable, comprising: a pressurizing member 90 for applying an acting force such that the outer skin fixing member 80 is tightened in the center line direction while being spirally connected from the outside to the inside of the 2 ′. Branching device.

2The outer skin fixing member 80 includes a screw portion 82 connected to the first screw portion 62 and the third screw portion 62 on the main housing 60 or the sub housing 60 ′,

It is formed in a taper shape on the opposite side of the drawing direction of the optical tip cable 50 or the flexible tube 72 from the rear surface of the screw portion 82, and a predetermined length is provided on a horizontal center line on the surface. The entrance 86 is protruded inward following the drawing direction of the optical cable or the flexible tube, and is formed by a clamp portion 84 formed with a large number of cutouts 88 on the peripheral surface of the tapered portion. 2. The optical cable branching device for a multi-core cable according to claim 1, wherein

3. An indentation on the inner peripheral surface of the inlet 86 that constitutes the clamp portion 84 improves the adhesion to the optical cable 50 or the flexible tube 72 and prevents it from being detached well when a tensile force is applied. 3. The optical cable branching device for a multi-core cable according to claim 2, wherein 86 a is formed.

4. The pressing member 90 is formed on the outer peripheral surface of the distal end portion and is connected to the first screwing portion 62 of the main housing 60 or the third screwing portion 62 of the sub housing 60 '. Screw part 9 2 and

The optical cable 50 or the flexible tube 72 is bent from the inside of the distal end of the screw portion 92 to the side opposite to the direction in which the optical cable 50 or the flexible tube 72 is pulled in. A pressing portion 94 for tightening the portion 84 inward, and a rotating operation portion 96 for projecting in an annular shape on the outer peripheral surface behind the screw portion 92 so as to be easily rotated in a state of being gripped when screwed. 2. The optical fiber branching device for multicore cable according to claim 1, wherein:

5. A fixing tool 100 having a large number of through holes 102 formed on its surface is fitted inside the distal end of the flexible tube 72, and the fixing tool 100 and the sub-branching member 70 are fitted. 2. The optical fiber branch for multi-core cable according to claim 1, wherein a central iron wire 110 extending from the center of the flexible tube 72 is fitted on the center line of the optical fiber.

Amended paper (Article 19 of the Convention) - twenty three -

6. The outer skin fixing member 80 connected to the third screw portion 6 2 ′ on the sub-housing 60 0 ′ and the sub-branching member 70 0 ′ connected to the fourth screw portion 6 4 ′ have a fixed length. The optical fiber branching device for a multi-core cable according to claim 1, wherein the optical fiber branching device is connected to each other by a plurality of connecting bars (130).

7. In front of the screw portion 82 forming the outer skin fixing member 80, a number of tension thread through holes 140 are formed in a direction aligned with the inlets 86 to form the outer skin fixing member 86. Outside of the clamp portion 84, the pressing member 90 was sequentially fitted to the outside surface of the clamp portion 84 by a sequential fastening operation, and was fitted through the tensile thread through hole 140 and then folded backward. 7. The optical fiber branching device for a multi-core cable according to claim 6, wherein a tension thread fixing cap 150 for fixing the tension thread 142 without falling off is fitted.

8. The multi-piece according to claim 7, wherein a number of cutouts 152 are formed in the longitudinal direction at regular intervals on an outer peripheral surface of the tension yarn fixing cap 150. Optical cable branching device for optical fiber.

9. The main branch member 70 or the sub-branch member 70 ′ is provided with the central tension line fixing hole 7 4 so as to branch the ribbon-shaped optical cable 120 into a plurality of ribbon-shaped optical fibers 122. A plurality of ribbon tube fitting holes 78 a into which a large number of ribbon tubes 78 are fitted simultaneously around a are inserted in the direction parallel to the center tension wire fixing hole 74 a. The optical cable branching device for a multi-core cable according to claim 1, characterized in that:

10. The main branching member 70 or the sub-branching member 70 ′ is a plurality of connecting members 1 having a predetermined length with respect to the outer skin fixing member 80 fitted to the main housing 60 or the sub-housing 60 ′. A single large rib tube fitting hole 7 8a is formed on the center line of the main branching member 70 or the sub-branching member 70 '. 10. The multi-core optical cable according to claim 9, wherein

1 1. The connecting member 160 extends from an edge of the inner surface of the main branch member 70 or the sub-branching member 70 ′, and a branch having a snap pit 16 2 a formed at the end thereof. Component side connection bar 1 6 2

An outer skin fixing member extending from an edge of the outer skin fixing member 80 to the branch member side, and having a locking groove 164 a formed at an end thereof, into which the snap pit 16 2 a is fitted and locked. Material Corrected paper (Article 19 of the Convention) 22. The optical cable branching device for a multi-core cable according to claim 10, wherein the connection is made by a side connection bar 164.

1 2. (Deleted)

1 3. (Correction) A pressure member 90 and a skin fixing member 80 are sequentially inserted into the outer peripheral surface of the terminal end of the optical cable 50 to be drawn in, and are positioned inside a predetermined length, and the main branch is performed. A preparation stage (ST-1) for inserting the flexible tube 72 into the branch hole 76 of the member 70, and fixing the center tension line 54 of the optical cable 50 to the center tension line of the main branch member 70. A branching step (ST-2) in which a predetermined number of optical fibers 52 of the optical cable 50 are distributed and inserted into the flexible tube 72 coupled to the main branch member 70. ,

The main branch member 70 is positioned at a predetermined position of the center tension line 54, and after removing the center tension line 54 protruding forward of the main branch member 70, the main branch member 70 and the center tension line are removed. A center tension fixing step (ST-3) for fixing the wire 54 with a strong adhesive; inserting the main branch member 70 into the main housing 60; rotating the main housing 60 to rotate the main branch member 60; A main branch member coupling step (ST-4) in which 70 is provided in the second screw portion 64 in the main housing 60;

The outer skin fixing member 80 is connected to the inside of the first screwing portion 62 on the main housing 60, and the pressing member 90 is connected to the first screwing portion 62, which is behind the outer skin fixing member 80. An optical cable outer skin fixing step (ST-5) in which the outer skin fixing members 80 are connected and tightened to tightly grip the outer skin of the optical cable 50, and a number of optical fibers built in the optical cable 50 are formed. Is divided into a number of flexible tubes 72 and branched.

14. (Correction) The pressing member 90 and the outer skin fixing member 80 are sequentially inserted on the outer peripheral surface of the end portion of the flexible tube 72 so as to be positioned inside by a fixed length, and the sub-branching member 70. A preparatory stage (ST-6) for fitting the protective tube 7 2 ′ into the branch hole 7 6 ′

With the single-core optical fiber 5 2 ′ in the flexible member 72 being discharged to the outside through the through hole 102 on the fixture 100, the central iron wire 111 is placed on the center tension line of the fixture 100. 0 after fitting the fixture installation step of揷着the fixture 1 0 0 inside the tip of the flexible tube 7 2 (ST - 7) and, capturing Tadashisa the sheet ⁽⁹ Treaty No. I) -25-The center iron wire 110 is fitted on the center line of the sub-branch member 70 ′, and the single-core optical fiber 5 2 ′ is placed in the protective tube 7 2 ′ connected to the sub-branch member 70 ′. Branching stage (ST-8)

The sub-branch member 7 0 ′ is positioned at a predetermined position of the center iron wire 110, and after removing the center iron wire 110 protruding forward of the sub-branch member 7 0 ′, the sub-branch member 7 0 ′ is removed. And the center iron wire fixing stage (ST-9) to fix the center iron wire 110 with strong adhesive,

The sub-branching member 70 ′ is inserted into the sub-housing 60 ′, and the sub-branching member 60 ′ is rotated to set the sub-branching member 70 ′ at the fourth engagement portion 6 4 ′ in the sub housing 60 ′. Sub-branch member joining stage (ST-10),

The outer cover fixing member 80 is connected to the inside of the third screw portion 62 ′ of the sub-housing 60 ′, and the pressing member 90 is connected to the third screw member corresponding to the rear side of the outer cover fixing member 80. A flexible tube outer skin fixing stage (ST-11) in which the outer skin fixing member 80 is tightened by being connected to the portion 6 2 ′ and the outer skin of the flexible tube 72 is tightly gripped. 14. The method according to claim 13, wherein the optical cable is configured to be branched.

Amended paper (Article 19 of the Convention) -26-Statements under Article 9 of Convention 1

The international search report issued on Feb. 14, 1990 published a comparison of the invention of the present application with each of the cited references. It is recognized that it is publicly known before the application, and the relevant paragraph 12 will be deleted, and the amendment will be made according to the replacement sheet attached with claims 13 and 14.